§393.104 What standards must cargo securement devices and systems meet in order to satisfy the requirements of this subpart?
(a) General. All devices and systems used to
secure cargo to or within a vehicle must be capable of meeting the requirements
of § 393.102.
(b) Prohibition on the use of damaged securement devices. All tiedowns, cargo securement systems, parts and components used to secure cargo must be in proper working order when used to perform that function with no damaged or weakened components, such as, but not limited to, cracks or cuts that will adversely affect their performance for cargo securement purposes, including reducing the working load limit.
(c) Vehicle structures and anchor points. Vehicle structures, floors, walls, decks, tiedown anchor points, headerboards, bulkheads, stakes, posts, and associated mounting pockets used to contain or secure articles of cargo must be strong enough to meet the performance criteria of §393.102, with no damaged or weakened components, such as, but not limited to, cracks or cuts that will adversely affect their performance for cargo securement purposes, including reducing the working load limit.
(d) Material for dunnage, chocks, cradles,
shoring bars, blocking and bracing. Material used as dunnage or dunnage
bags, chocks, cradles, shoring bars, or used for blocking and bracing, must not
have damage or defects which would compromise the effectiveness of the securement
system.
(e) Manufacturing standards for tiedown assemblies. Tiedown assemblies (including chains, wire rope, steel strapping, synthetic webbing, and cordage) and other attachment or fastening devices used to secure articles of cargo to, or in, commercial motor vehicles must conform to the following applicable standards:
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An assembly component of… |
Must conform to… |
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(1) Steel strapping 1, 2 |
Standard Specification for Strapping, Flat Steel and Seals, American Society for Testing and Materials (ASTM) D3953-97, February 1998. 4 |
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(2) Chain |
National Association of Chain Manufacturers' Welded Steel
Chain Specifications, |
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(3) Webbing |
Web Sling and Tiedown Association's Recommended Standard Specification for Synthetic Web Tiedowns, WSTDA-T1, 1998. 4 |
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(4) Wire rope 3 |
Wire Rope Technical Board's Wire Rope Users Manual, 2nd Edition, November 1985. 4 |
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(5) Cordage |
Cordage Institute rope standard: (i)
PETRS-2, Polyester Fiber Rope, three- (ii)
PPRS-2, Polypropylene Fiber Rope, three- (iii)
CRS-1, Polyester/Polypropylene Composite Rope Specifications, three- (iv)
NRS-1, Nylon Rope Specifications, three- (v) C-1, Double Braided Nylon Rope Specifications DBN, January 1984. 4 |
1 Steel strapping not marked by the manufacturer
with a working load limit will be considered to have a working load limit equal
to one-fourth of the breaking strength listed in ASTM D3953-97.
2 Steel strapping 25.4 mm (1 inch) or wider must
have at least two pairs of crimps in each seal and, when an end-over-end lap
joint is formed, must be sealed with at least two seals.
3 Wire rope which is not marked by the manufacturer
with a working load limit shall be considered to have a
working load limit equal to one-fourth of the nominal strength listed in the
manual.
4 See § 393.7 for information on the
incorporation by reference and availability of this document.
(f) Use of tiedowns. (1) Tiedowns and
securing devices must not contain knots.
(f)(2) If a tiedown
is repaired, it must be repaired in accordance with the applicable standards in
paragraph (e) of this section, or the manufacturer's instructions.
(f)(3) Each tiedown
must be attached and secured in a manner that prevents it from becoming loose,
unfastening, opening or releasing while the vehicle is in transit.
(f)(4) Edge protection must be used whenever a tiedown would be subject to abrasion or cutting at the point where it touches an article of cargo. The edge protection must resist abrasion, cutting and crushing.
[38 FR 23522,